Refrigerating unit



July 24, 1934. R w, KRITZER 1,967,312

REFRIGERATING UNIT Filed March 25, 1929II)IIIIII/III!!!IIIIIIIIIIIIIIIIIIIIll! fllIIIIIII/IlllllIIIIIIIIA'IIIIIIIIIIIIIIIIIIIIIIIlllllllllIIIIIIIIIIII/IIIIIIIIIIIJ0'1"!!!IIIIIIIIIIIIIIIIlI/zVII/III!!!I!llIllIIllllllllIll[III/111111111IIIIIll/lz INVENTOR A? W KR/TZE/P ATTOR N EYYS Patented July 24,1934 UNITED STATES PATENT OFFICE REFRIGERATING UNIT Application March25, 1929, Serial No. 349,840

18 Claims.

type described in which the float valve mechanism may be actuated byv aminimum amount of refrigerant liquid.

Other objects and advantages will appear in the following specification,and the novel features of the invention will be particularly pointed outin theappended claims.

' My invention is illustrated in the accompanying drawing, forming partof this application, in which Figure 1 is a longitudinal sectional viewof my device,

Figure 2 is a'front elevation, partly in section, of the device shown inFigure 1, and

Figure 3 is a diagrammatic view of a refrigerating system embodying myinvention.

In carrying out my invention, I provide a refrigerating unit 1comprising an outer shell 2 and an inner shell 3 formed from a singlepieceof material. The material is doubled as at 4 and the outer shell 2is spaced away from the inner shell 3 as shown in Figures 1 and 2. Theinner shell 3 is depressed as at 5 for forming a compartment withinwhich a float .6 is disposed. As will be seen by referringto Figures 1and 2, the depressed portion 5 conforms substantially to the contour ofthe float 6.

The ends 7 and 8 of the inner and outer shells 2 and 3, respectively,are welded together as at 9. A cover 10 is secured to one end'of theunit 1 by means of bolts 11 which are welded to the outer and innershells as shown in Figure 1. The cover 10 is provided with a threadedopening 12 within which a feed pipe 13 is disposed. The 'cover is alsoprovided with a boss 14 having an opening 15 communicating with theopening 12. 60 The float 6 is suspended from an arm 16 pivotallyconnected at 17 to a pair of projecting lugs 18 formed integral with thecover 10. The arm 16 is provided with a valve 19 which is arranged forclosing the passageway 15, see Figure 1.

In referring 'to Figure 2, it will be seen that a freezing chamber 20 isprovided within which a. freezing pan 21 may be disposed. The bolts 11are welded to the outer and inner shells 2 and 3, respectively, as shownat 22 in Figure 1. The cover '10 is provided with an opening 23 withinwhich a vapor pipe' 24is secured.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood. In Figure 3 I haveindicated diagrammatically an installation embodying my invention. Therefrigerating unit 1 is disposed within a refrigerator 25. The vaporpipe 24 is connected with a main vapor line 26. The vapor line 26 isoperatively connected with a compressor 27 which is operated by means ofa motor 28 con- 0 nected with a source of current through conductors 29and 30.

The compressor 27 is connected with a condenser 31 by means of a pipe32. The feed pipe 13 is operatively connected with a main feed pipe 33which is operatively connected with the condenser 31.

In operation, when the compressor 27 is working, the refrigerant vaporwill be forced into the condenser, where it is cooled and liquefied. Theliquid within the condenser is forced into the feed line 33 and throughthe pipe '13. The refrigerant liquid which passes through the pipe 13 isforced through the passageway 15 and flows into the depression or recess5. The refrigerant liquid will flow over the formation 34 and pass intothe space between the outer and inner shells. When the liquid within therefrigerating unit has reached an approximate level indicated by theline 35, the float 6 will be lifted sufficiently far for moving thevalve 19 into a closing position with respect to the passageway 15. Itwill thus be seen that I have provided a refrigerating unit in which aminimum amount of refrigerant liquid is required. In addition to thisthe construction is such that the float 6 is actuated by a relativelysmall amount of refrigerant liquid. After a certain amount of liquid hasbeen vaporized, the liquid level within the depression 5, which may betermed the float chamber, is such that the float will be lowered formoving the valve 19 out of engagement with the passageway 15, wherebyadditional refrigerant liquid is permitted to enter the unit. Thevaporized liquid is drawn' from the refrigerating unit through the pipe24. .In formingthe unit, I preferably employ a tubular sheet ofmaterial. It is not of course. necessary to employ the tubular sheetsince the unit mayLbe made from a sheet of material and welded togetherat the connecting line.

I claim:

l. A refrigerating unit comprising two shells one inside the other witha space between them, said shells being formed of a single piece ofmetal, which piece also forms a'connecting wall between them at one end,to close said space at that end, said inner shell being cupped at oneend to define a float-receiving chamber.

2. A refrigerating unit comprising two shells one inside the other witha space between them, said shells being formed of a single piece ofmetal which piece also, forms a connecting wall between them at one end,to close said space at one end, said inner shell being cupped at one endto define a float-receiving chamber, said floatreceiving chamber beinglocated near the top of the unit, the metal of said inner shell at oneside of said chamber being bent to define an overflow lip.

3. A refrigerating unit comprising two shells one inside the other witha space between them, said shells being formed of a single piece ofmetal which piece also forms a connecting wall 1 between them at oneend, to close said space at one end, said inner shell being cuppedinwardly at one end to define a float-receiving chamber, saidfloat-receiving chamber being located near the top of the unit, themetal of said inner shell at both sides of said chamber bent inwardlyand downwardly to define an overflow lip.

4. A refrigerating unit comprising two shells one inside the other witha space between them, said shells being formed of a single piece ofmetal which piece also forms the connecting wall between them at oneend, to close said space at one end, said inner shell being cuppedinwardly at one end to define a float-receiving chamber, and a weldedjoint closing the narrow portion of the open end of said space.

5. A refrigerating unit comprising two shells one inside the other witha space between them, said shells being formed of a. single piece ofmetal which piece also forms a connection between them at one end, toclose said space at that end,

said inner shell being cupped inwardly at one end to define afloat-receiving chamber, a welded joint closing the narrow portion ofthe open end of said space, and a cover plate for closing the open endof said fioat chamber.

6. A refrigerating unit comprising two shells, one inside the other withan annular space between them, said shells being formed of a singlepiece of metal which piece also forms a-connecting wall between them atone end, to close said annular space at one end, said inner shell beingcupped inwardly at one end to define a float-receiving chamber, a coverplate for closing the open end of said chamber, and float and valvecontrol means assembled as a unit with said cover plate. I

'7. A refrigerating unit comprising two shells one inside the other witha spacebetween them, said shells being formed of a single piece of metalwhich piece also forms a connecting wall between them at one end, toclose said space at one end, said inner shell being cupped inwardly atone end to define a float receiving chamber, a cover plate closingtheopen end of said chamber, said cover plate carrying inlet and outletconnections and float control means for one of said connections.

8. A refrigerating unit comprising two shells one inside the other witha space between them, said shells being formed of a single piece ofmetal which piece also forms a connecting wall between them at one end,to close the space at one end, said inner shell being cupped inwardly atone end to define a float receiving chamber, and a float in said chamberclosely conforming to the shape of said chamber below the liquid level.v

9. A refrigerating unit comprising two shells one inside the other witha space between them, said shells being formed of a single piece ofmetal, which piece also forms a connecting wall between them at one end,to close said space at one end, one of said shells being cupped toenlarge a portion of said annular space into a floatreceiving chamber.

10. A refrigerating unit-comprising a tubular member bent to positionsubstantially half of the member inside the remaining half inspacedapartrelation therewith, a portion of one of the halves being bentaway from the other half to define a float-receiving chamber, and meansfor closing the space between the halves around their edges at one endof the unit.

11. A refrigerating unit comprising a tubular member bent to position aportion of the member inside the remaining portion in spaced-apartrelation therewith, the space between the inner portion and the outerportion being adapted to receive a refrigerant, the space within theinner portion defining a freezing chamber, the ends of said tubularmembers terminating in a common plane, one portion being bent away fromthe remaining portion to define a float-receivin chamber, and means forclosing the space between the inner and outer portions around theiredges at one end of the unit.

12. A refrigerating unit comprising an inner shell and an outer shellformed of one piece of material .with a spacebetween them and shaped toprovide a freezing chamber, said piece of material forming a wallbetween the shells at one end, the space between the shells at theopposite end being welded together partly around the unit, a cover platefor closing the remaining space between the two shells at said oppositeend, and bolt means welded to said shells and arranged for fastening thecover plate in position.

13. In a refrigerating unit, a. single piece of sheet metal bent. toprovide a space for liquid refrigerant, a space for refrigerant vapor, afloat chamber, and a freezing chamber, said metal having a main bendaround the periphery of one end of the unit in a plane normal to theaxis of said freezing chamber.

14. In a cooling unit, a single piece of sheet metal shaped to providespace for refrigerant material, a float chamber, and a freezing chamber,said metal having a main bend around the periphery of one end of theunit in a plane normal to the axis of said freezing chamber.

15. In a cooling unit, a single piece of sheet metal shaped to providespace for refrigerant material, a float chamber, and a freezing chamber,said freezing chamber having open ends, and said space extendingperipherally entirely around said freezing chamber.

- 16. In a cooling unit, a single piece of sheet metal shaped to providespace for refrigerant material, a float chamber, and a freezing chamber,said space and float chamber each having one end axially open andaccessible, but being otherwise completely defined and enclosed by saidsingle'piece of metal.

, between the shells.

uni,

18. An annular refrigerating unit with an opening, extending axiallythrough the unit to define a freezing chamber, said unit comprising twoshells, one inside the other with a space he- 3 tween them, both shellsencircling said freezing chamber,- said shells being formed of a singlepiece of metal, which piece also forms an annular connecting wallbetween the shells at one end,

,to close the space between the shells at that end,

and a closure for the other end of the space between the shells, aportion of said shells around said chamber being more closely spaced,and an upper portion being more widely spaced, said widely spacedportion defining a. chamber for housing control mechanism. f

- RICHARD W. KRITZER.

